Reinforced-concrete column construction.



H. S. TAPT.

REINFORCED CONCRETE COLUMN CONSTRUCTION APPLICATION FILED MAY 22, 1913.I 1, 1 1 1,1 94. Patented Sept. 22, 1914.

. 4 SHEETS-SHEET 1. Q

THE NORRIS PETERS 60.. PHOTO-LITHQ. WASHINGTON. my C.

H. S. TAFT.

REINFORCED CONCRETE COLUMN CONSTRUCTION.

APPLICATION FILED MAY 22, 1913. 1 1 1 1 1 94.

Patented Sept. 22, 1914.

4 SHEETS-SHEET 2.

THE AORRIS PETERS c0 PHOTD-LITHOY, WASHINGTON, n c

H. S. TAFT.

REINFORCED CONCRETE COLUMN CONSTRUCTION. APPLIGATION FILED MAY 22, 1913.

1, 1 1 1, 1 9 1, 1 Patented Sept. 22, 1914.

4 SHEETS-SHEET 3.

ZiZiZesses: 2

THE NORRIS PETERS c0. PHOTO-LITHO., WASHINGTON. D. C,

H. S. TAFT.

REINFORGBD GONGRBTE COLUMN CONSTRUCTION. APPLICATION FILED MAY 22, 1913.

Patented Sept. 22, 1914.

4 SHEETSSHEET 4.

/l 4/ 2 4 gin 64144,

ff H- rm: .JORRIS PETERS c0 PHOm-LITHQ. IIASHINGTON. r), C.

nnmrononn-ooncnmn COLUMN ooivsrnucrron.

V To all whom acitizen of the UnitedgStats, and resident of Seattle, inthe county' of King; and State of Washington, have invented new'and ,useful Improvements inv Reinforced-Concrete. ColumnaConstruction, of. which:the following is a'specificatiom My invention relates tol reinforcedcon:

crete construction,- andconsists in-Qcertain V improvements by WlllCh.column'arxsupports fondecks or floors are endowed :with ,an

elnforcedconcrete columns which .eme

their effective, operation, fu pon' attachment to the covering floororqslab by "means of" internal steel reinforcement, although the vreinforcement of the column head may, for a convenience in"; supportingthe reinforcing metalduring construction be carried into or"incorporated with the reinforcement ofvad concrete floor, slab. Inconnection withthis. improved column, simplifications and 1 m.-provements 'oflfloor slab reinforcement are ;ma'cle possible.

I In the drawlngs hereto anneizedxtwhich' illustratemy inventions,Figure1 is a ver itical; section of the head of a reinforced concretecolumn;Fig. 2 is aplan view show-1 ing the modein wliich thereinforcingasteel is arranged in and near the head of the column; Fig. 3isna vertical sec'tionion the broken line 3 23, Fig 4, of amodified formof column and head; Fig. i is a plan view on a reduced scale of thecolumn head: shown in Fig, 8-, Fig. 5 is avertical section atthe v line5 5fof Fig.4; Fig. 6 is a diagramrillus- .tratingthemethod of;reinforcing floor slab to belaus'ed in connection with my improved 1reinforoedconcrete column; Fig. 7 is adia- 1 reinforced concretefloorslab superimposedgram illustrating another mode of floor slabreinforcement; Fig.8 isan elevation,vpartly ibroken away and: inisection, of a column surmounted by a rectangular .expanding' head; Fig.9 is. a' plan'view of the column head of; Fig. 8 ;IandaFig. 10 is anelevation,

"partly broken and partly in section,

of a column "with-rectangular head and thereon.

Referring 2, a reinforced concrete column I G which" may be constructedinthe manner described in an application for United States LettersPatent filed .by me Specification; or Letters Patent. I A plication m'atra 22, 1913. Serial Nb. 769,216.

improved a and superior- ;capacity for carry:

In 1 w i "body'my improvements-doznotdepend, for-1 aelaasepmz, 1914.

' concurrently herewith, Serial No. 769,212,

is surmounted byan integrally-"formed ho-llow conical head The steelreinforcement for the conical head is anchored in and extends upwardfrom the bodyof the column G and consists of radial steel members R,

R and R the members B being anchored inthe body of the column C andextending upward toward the 'geometrical baseof the inverted cone which*oonstitutesfthehead 1 H, the radial members Rand R being shorter thanthe members R, and arranged in such manner as to supply a-substantiallyuniform "quantity-"of reinforcing material per square foot of surface inthe conical {head H at all "parts of the same. If desired, the ends ofthls" radial reinforcing material may be extended upward out of theconical head H, as shown in dotted lines atB, so as to beavailable forincorporation with a reinforced concrete floorslab, although'suchextension of reinforcement of the conical head into the floor slab is"not necess'aryfnr the system ofconstruction which is characterized bythe hollow expanding-headed columns herein described. Theradial mem-'bers R, R and R of thereinforcement are supplemented bycircumferentially disposed members which'may be arranged in effect toconstitute a continuous spiral extending" from the spirally, arrangedreinforcement B in the top of the column Gto the similar reinforcement Bin the hollow conical head The helical or spiral form of circumferentialreinforcement has theeffectof a series of reinforcing "rings ofsuccessively increasing diameters in conformity with the upwardenlargement ofthe head H. The circumferential reinforcements B, B emtostresses which tend to expand or burst theh'ead I-I."

'While, formany purposes, a hollow expanding .ordpwardly flaring head,such shown in Fig.1, will sufiice, the further remforced andstrengthened form shown 1n 1 .95 brace the radial reinforcements R, Rand R so asto afford the necessary resistance Figs. 3, 4 and 5, is,I;believe,"to he pm-. a

ferred.:; In these figuresthe upwardly flaring head H surmounting thecolumn 0, is provided with vertical transverse webs which attheir'intersection form the central postfiP'. Inaddition to theradialand circumferential reinforcements R, B and B, there is providedtransverse reinforcement D; comprising steel rods which extend dia- 1 1at ipoints which are distantfrom'each other metrically acrossthecolumnhead and are incorporated in the Webs W. The diametri. calreinforcementsD are preferably hooked or otherwise tiedto thecircumferential reinforcement B as at D. Vertical reinforc; ing materialP may, if desired, be intro? duced to increase the rigidity of thecentral p'os'tP, andcons'titute it, in effect, a continuation of thecolumn 0." i

heads, or, for thatimatter, might be formed f a reinforced concretefloor is to be supported by c a group of columns" such .as here'-inabove described, the reinforcement of. such floor. may be; andpreferably is, wholly in:-:; dependent of thereinflorcemeht. ofthecolumnsaand heads;- themselves A in so far as resistance to stresseslisconcerned ;.-.as iilluse tratcdzin Fig. 10 a reinforced concrete floorslab F; maybe molded on top oftheycolumn.

separately and independently and then=laid as a.;comp'leted= slab uponthe columnar.- Ob. viously,however, it- 1will better serve the economiestof construction to construct such. floor slabs in saw. upon thecolumns. Referring to.F1g. 6,, the .headz'H.-of.an expaneling-headcolumn,'such.as above de-i Iinesrepresenting a mode .of reinforcementscribed, is shown in; dotted lines, the full of the floor slab toibelaidupon and sup-,: ported by the column head H. 1 Rings T. ofreinforcing isteel are'laid concentrically in the slab and radiallyextending reinforcing.

pieces Sare incorporated inathe slab.so as toccooperate with theouterrings T and to extend .beyond the periphery of the. column i head H.When the number of columns with. upwardly flaring heads -H are arrangedram dially in longitudinal and 1 transverse rows,-

annular .and radiating. slab reinforcements, I

such as shown in Fig. 6,.wil1 operateefe fectively to resistbendingmoments-developedin the floor slabs. j Y

In Fig. 7 there is illustrated another mode of reinforcing a concretefloor laid upon a group of columns, the reinforcement in this caseconsisting of longitudinal, parallel. re-

.inforce'ment. rods F, transverserods Gr and diagonal rodslVLand N; Thecolumns are preferably so grouped that awdiagonal re-.- inforcement rod,such, as N, which. isjust tangent to the outer periphery of one of thecolumn .heads,.will pass Within or very close to the periphery of thenext column head so that each diagonal rod in the system will receivedirect supportfrom theco'lumn heads less than the distance from centertorenter diagonally betweenuany two column heads.-

v."Practica'lly every 2 diagonal-rod therefore will pass over and besupported by each of the column heads in two-adjacent diagonal rows. H

.For some purposes it may be desirableto employ expanding. or upwardlyflaring con ical column headswhich, instead of being geometricallyconical, be in form. .Such forms are illustrated in Figs. 8,.9 and 10 inwhich the headsH are rec: tangular in horizontal section and arereinforc -ed. like. the conicaly head H by radial .reinforcement R andperipheral reinforce- :mentB'a. Preferably, also, column heads-of :thischaracter will be further strengthenedby webs which ma y extend bothdiametrically and diagonally across the interior .of

the hollow head. a Such WcbSFareshoWn at V and V in Fig.9,andfthjettransverse, that is to say, diametrical and-z diagonal-rei-nforcement forsuch w'ebs is. indicated at (Z- and cl g theperipheral" reinforcementbeing so a lsh'ownin'dotted: lines atBL iReferI-ing '-to--'the construction shown in.

Figs. 3, 4, 5, s, 9 and 10,which illustrate the preferred formofinternally :Webbiedhollow expanding coliunnl 'headgthe hollow expand53 P as ll'ltPElgStf-i, Ar nd y; which webs consists of: thediametrically orfidia'go '100 nally arranged horizontal ,IiOdSWhiOl'U'fun-T ithermore tie the rings or spirals of the c1r-" Ipumferentml: IBIDfOI'CGIIIQ IIti '-d1ametr1cally.

The ends Figs. 1,22rarid may-be bent insuch a wayx-as to ti'e theslabsteel to the. head-steelybut even in t-his case the radialhead-reinforcement will not act as a re-.1 inforcement "oftheslab'itself,- y 3 l I In. the construction illustrated, in f-Fig: 7' theextreme peripheries of the column heads to the same1diagonal, d5": line:so;that, in effect, every diagonal rod' will pass overeach 1 may be thehead should .beo'fsuch a size as reinforcement will: obtain theadvantage of the. shortest vpossible-1 unsupported span. i Thereinforcements, such asshown' in Fig." 7, will preferably-ybe -induplicate,- consist-.1

ng of two distinct similar sets of longitu :linal, transverse andcliagonaljrods, one net- Work'of rods-being located nearjthe bottom nearthe top.. The'-bot tom layer of rods will then take up all the tensionstresses inthe lower part-of the slab orrtfloor and'the" top rods allthe negative :bending' stresses 'over the supporting slabs; 10;, thesenegativein two adjacent diagonal rows'arectangentf head. iWhateverithe.actual column spacing 115.

to'meet this requirementasst-that Jthe slab of the slabor flooring; andthe 5 other set125 v :ofreinforcing rods are present in the floor or ona raft or crib, substalmng a reactive stressesycan be taken care of by.the individual spider web arrangement shown ,in Fig. 6, preferably incodperation with the network arrangement shownin Fig.97, em-

ploying thenetwork of straight rods at or 'near the bottom of the floorslabs and the spider web 7 reinforcements fat the level 1 near the topof the floor slab.

symmetricallybetween each group of four p column heads.

Itlwill be noticed that where the system illustrated inFig. Tisused,atleasttwo. sets slab, as at the rectangular spacer located With thisarrangement-7% of the floor slab has two such belts of. rods,

39% has threebelts, and 54;% has fourbelts,

span from head to head.

mended, however, that in all cases a proper measure of diagonalreinforcement be,em-

ployed in the manner hereinabove suggested.

Among. the advantages of the above de- H scribed construction thefollowing, maybe enumerated: The upwardly flaring reme forced concretehollow heads of the columns are self supporting and amply capable of Thestresses developed in the construction are simple, Irrespective of thetype of :head

1 5 0 employed, notjless' than two sets v of belts of Tresisting theexpansive stressesfof superimposed load. The slab or floor: reinforcement needs inno way to betiedto or incor- 1 ;porated with the columnhead reinforce- 1nent.. Perfectly straightunbent reinforcing. rods maybeemployed throughout the entire deck slab and not a single cant-aliverreinforcing bar is requiredin any of the types of constructionhereindescribed. The; spans without direct support from thecol-f umn heads areshort and the disposition of reinforcing material in thefloor slabsin]re .lation to the column. heads is such that a minimum of unsupportedspan is insured,

reinforcing rods are found in every portion The'column headhereinabovedescribed is shown as a development at the top of a'column,adapted to receive and support a superincumbent floor load. It isobvious that a column of essentially the same characteristics, withasiniilarhead, may be inverted, the head constitutinga lower headorbase, adapted to'rest upon a foundation,

load from below. In using the term 2. A column head, comprising a hollowconcrete body, transverse concrete .members.

A. The comblnation of a concrete column,

head I some thereby an" inverted head or base of the. characterdescribed. 7

I claim: i y 1. A" column head, comprisinga flaring hollow concretebody, transverse concrete websintegral with said body, and reinforcementarranged in flaring formfinfthe body andtransversely in said webs.

flaring webs integral with said body, reinforcement arranged in flaringform in the flaring body and transversely in the web's, saidreinforcement consisting of radial members and circumferentiallydisposed members'in the flaring body, and transverse members in saidwebs.

3. A column head,- comprising a flaring 'concrete body, transverseconcrete webs integralgwith said body, reinforcement arranged in flaringform in the flaring body and transversely in the webs, the"bodyreinforcement comprising radial members andcircumferentially disposedmembers which ,inclose the framework formed by the radial a column headcomprising a flaring hollow concrete body, transverse concrete websintegra'l with saidbody, and reinforcement arranged in. flaring form 1n.the sald concrete body and transversely in the said webs,

part of the said reinforcement extending from the head into the column.

5. The combination of a concretecolumn,

a column head comprising a flaring hollow concrete body, transverseconcrete webs in-' tegral with said body, and reinforcement arranged inflaring from in the flaring body and transversely'in the webs, saidreinforcement consisting "ofradial members and circumferentiallydisposed members in the flar 'ing body and transverse members in thewebs,,portions ofsaid reinforcement extending from the head into theconcrete column. '6. The combination of a concrete column,

afcolumn head comprising a flaring hollow body, transverse concrete Websintegral with said body, reinforcement arranged in flaring form in theflaring body and transversely in the webs, said reinforcement comprisingradial members and circumferentially'disposed members which lnclose theframework 12th day ofMay 1913.

CL'IrroRn WILEY.

'l copies ot this patent may be obtained. for five cents each, byaddressing the. Commissioner of .Patents, I i Washington, D. G. i

i formed by the radial members, parts of said reinforcement extendingfrom the head into the concrete column. v Signed by me at. SeattleWashington this

